*{margin: 0;padding: 0;}
#slider1{
    width: 800px;
    height: 200px;
    overflow: hidden;
    position: relative;
}
#slider2{
    margin-top: 50px;
    width: 800px;
    height: 200px;
    overflow: hidden;
    position: relative;
}
#slider3{
    margin-top: 50px;
    width: 800px;
    height: 200px;
    overflow: hidden;
    position: relative;
}
ul{
    list-style: none;
    position: absolute;
    left: 0px;
    top: 0px;
}
ul li{
    float: left;
}
#num{
    position: absolute;
    right: 20px;
    bottom: 20px;
}
#num span{
    display: block;
    float: left;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    margin-right: 10px;
    background: rgb(20, 20, 20);
    opacity: 0.8;
    color:#fff;
}
#num span.active{
    background: cornflowerblue;
}
.left{
    width: 56px;
    height: 87px;
    position: absolute;
    left: 10px;
    top: 57px;
    background: url("../img/h.jpg") ;
    background-size: 56px 87px;
}
.right{
    width: 56px;
    height: 87px;
    position: absolute;
    right:10px;
    top: 57px;
    background: url("../img/q.jpg") ;
    background-size: 56px 87px;
}